Ahahahahahaha, that was my thought too! Free food (angry peasant mobs/livestock), free loot (rich castles, pity you can't spend it though), free hot princess to harass (provided you do find one to begin with, the medieval area isn't exactly well-known for having beautiful people), instant infamy (by rampaging through various towns)! And what's more, annoying planes dont exist here! If angels exist, so should magic. I'd have to take up something that gives me a human disguise. It sure would get annoying trying to quietly pass through human-populated areas as a gigantic reptilian beastie.